1 ; RUN: opt -gvn -S < %s | FileCheck %s 2 3 ; Check that the redundant load from %if.then is removed. 4 ; Also, check that the debug location associated to load %0 still refers to 5 ; line 3 and not line 6. 6 7 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 8 9 ; CHECK: @test_redundant_load( 10 ; CHECK-LABEL: entry: 11 ; CHECK-NEXT: load i32, i32* %Y, align 4, !dbg ![[LOC:[0-9]+]] 12 ; CHECK-LABEL: if.then: 13 ; CHECK-NOT: load 14 ; CHECK-LABEL: if.end: 15 ; CHECK: ![[LOC]] = !DILocation(line: 3, scope: !{{.*}}) 16 17 define i32 @test_redundant_load(i32 %X, i32* %Y) !dbg !6 { 18 entry: 19 %0 = load i32, i32* %Y, align 4, !dbg !8 20 %cmp = icmp sgt i32 %X, -1, !dbg !9 21 br i1 %cmp, label %if.then, label %if.end, !dbg !9 22 23 if.then: ; preds = %entry 24 %1 = load i32, i32* %Y, align 4, !dbg !10 25 %add = add nsw i32 %0, %1, !dbg !10 26 call void @foo(), !dbg !11 27 br label %if.end, !dbg !12 28 29 if.end: ; preds = %if.then, %entry 30 %Result.0 = phi i32 [ %add, %if.then ], [ %0, %entry ] 31 ret i32 %Result.0, !dbg !13 32 } 33 34 declare void @foo() 35 36 !llvm.dbg.cu = !{!0} 37 !llvm.module.flags = !{!3, !4, !5} 38 39 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, isOptimized: false, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2) 40 !1 = !DIFile(filename: "test.cpp", directory: "") 41 !2 = !{} 42 !3 = !{i32 2, !"Dwarf Version", i32 4} 43 !4 = !{i32 2, !"Debug Info Version", i32 3} 44 !5 = !{i32 1, !"PIC Level", i32 2} 45 !6 = distinct !DISubprogram(name: "test_redundant_load", scope: !1, file: !1, line: 2, type: !7, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) 46 !7 = !DISubroutineType(types: !2) 47 !8 = !DILocation(line: 3, scope: !6) 48 !9 = !DILocation(line: 5, scope: !6) 49 !10 = !DILocation(line: 6, scope: !6) 50 !11 = !DILocation(line: 7, scope: !6) 51 !12 = !DILocation(line: 8, scope: !6) 52 !13 = !DILocation(line: 10, scope: !6) 53
